JP2000149726A - Switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switching device that can display a closing preparation complete state with a simple structure having a small number of components and can receive only proper information to an operator. SOLUTION: This switching device is provided with a contact means energized to an open position by a spring, a load mechanism of an energy storing means, and a kinematic switching system connected with the energy storing means, the contact means and the spring. The system is controlled by an opening latch 64 and a closing latch 70 when the switching device is in a closing preparation complete state, that is, in a state that it is opened and loaded and there is no permanent opening order. The switching device is provided with a display part, the display part takes three positions such as a no-load position, a closing preparation complete position and a loading-closing preparation incomplete or load-engagement releasing position. The display part is kinematically connected with the load mechanism, the opening latch 64 and the contact means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to, for example, EP-A-0,22
It relates to an electrical switchgear of the kind described in 2,645.

[0002]

2. Description of the Related Art A switchgear as described above has, for example, at least one set of contacts, at least one of which is a movable contact, and which has at least one movable contact (corresponding to a mechanical / electrical contact). ) The closed position and the open position can be set. This circuit breaker is of the type having a load mechanism equipped with an energy storage means and an opening mechanism.

The load mechanism includes a closing spring capable of shifting from a load state to a released state, and a closing latch capable of fixing the closing spring to the loaded state. The closure spring is associated with the movable contact such that release of the closure spring moves the movable contact to a closed position. The loading and closing mechanism further comprises a drive mechanism. The drive means of this drive mechanism, for example a swing handle, drives a freewheel mechanism designed to move the closing spring into a loaded state.

[0004] The opening mechanism includes an opening spring capable of shifting from a load state to a release state from the release state to the load state, and an opening latch capable of fixing the release spring to the load state. The open spring is associated with the movable contact such that release of the open spring moves the movable contact to an open position and movement of the movable contact to a closed position loads the open spring.

[0005] Such a circuit breaker can be in a number of different states, in particular a closed state, a no-load / open state and a loaded / open state. In a loaded or unloaded / open state, the release latch can assume an unlocked position, which is a rest position where the latch is generally elastically restored, and a locked position. The latch is in fact required to continually assume the latter locking position. This is done, for example, by a trip device that activates it by a ground fault in the conductive wire, or by an open pushbutton that is itself locked by an external latch that allows the operation to be performed in a switchgear.

[0006] However, the circuit breaker actually only re-opens if the load mechanism is loaded, the switch bar is in the open position, and the open latch is in its locked position. It must be closed. These three simultaneously satisfied conditions define a state called "ready to close" of the circuit breaker.

[0007] The low-voltage power distribution catalog of Merlan Gellan in 1989 has the brand name Masterpact,
A circuit breaker is described which provides an indication of the above-mentioned ready-to-close state in a switchgear. The internal operation of the technical device in such a state is shown in FIGS.

Referring to FIGS. 7 to 9, the load mechanism 10 of the circuit breaker 12 includes an energy storage means having a spring 14 cooperating with a transmission lever 16. The lever 16 is
Roller 2 rotatably mounted about fixed pivot 18 and interfering with load cam 22 mounted on shaft 24
It has 0. The shaft 24 supports a second cam (display cam) 26 for displaying the state of the circuit breaker 12. The cam 26 interferes with the finger 28 of the display unit 30 that is rotatable around the fixed pivot 32.

The display section 30 has a cylindrical wall section 34.
This wall portion 34 can be seen through a window 36 of an operation panel 38 at the front of the switchgear. The display unit 30 can take two positions. One is shown in FIG.
9 is a position where the no-load state of the load mechanism 10 is displayed, and the other is a position where the load state is displayed as shown in FIG.

In the loaded state of the load mechanism 10, that is, when the spring 14 is fully compressed, the finger 28 falls into the notch 40 of the display cam 26 in FIG. The circuit breaker is rotated to a position where a symbol indicating the load state of the circuit breaker appears in the window 36. When the loading mechanism 10 is not loaded, the finger 28 interferes with the cylindrical peripheral edge 42 of the cam 26, thereby causing the other portion of the wall 34 with the corresponding symbol to be displayed on the window 36. appear.

The display section 30 further has an arm section 44. The arm 44 acts on the sliding rack 46 so that the sliding rack 46 is pushed to the left in the drawing unless the circuit breaker is in its loaded state.

The display section 30 further includes an open display section 48 as shown in FIG. This open display section 48 is shown in FIG.
Of the load display unit 30 in a plane parallel to the plane
Attached to a pivot 50 extending from the shaft. The open display 48 is biased to an angular position (not shown) such that it presents an indication of the open state of the circuit breaker through the window 52 of the operation panel 38.

The open display 48 has fingers 54 that interfere with the cam 56 supported by the switch bar 58 (when the switch bar 58 reaches its closed position). This causes the support device 48 to be pivoted to the position shown in FIG. 9, ie, such that the support device represents through the window 52 an indication of the closed state of the circuit breaker. In this position, the arm 60 fixed to the support device 48 is
The sliding rack 4 must be in position unless the circuit breaker is in its open state.
6 interferes with the sliding rack 46 so as to be pushed leftward in the drawing.

The opening mechanism of the circuit breaker further comprises an opening latch 64 which can assume a locked position as shown in FIG. 8 and an unlocked position as shown in FIGS. 7 and 9. I have. The open latch 64 prevents the switch bar 58 from moving from its closed position to the open position in the former locked position, and allows such movement in the latter unlocked position.

The release latch 64 has an arm 66 (FIG. 9). The arm 66 acts on the sliding rack 46 unless the latch 64 is in the unlocked position.
Is pushed to the left in FIG. The sliding rack 46 is elastically biased to the right in the figure, but can reach the position shown in FIG. 7 only when all of the above three conditions in the ready-to-close state are satisfied. . In this position, the sliding rack 46
Causes an electrical contact, not shown, which activates a light indicator on the control panel 38.

Further, the sliding rack 46 is a kinematic between the closing push button 68 and the closing latch 70 (FIG. 9) adapted to release the load cam 22 only in this position. Form a link. This disables any closing command via push button 68 unless the device is in its ready-to-close state.

[0017]

The conventional switchgear described above has a mechanical display unit, that is, a state which is visible by an operator and indicates the ready-to-close state of the switchgear according to its position or state. There is a problem that it does not have a pure mechanical device.

In order to solve such problems, EP-A
No. 0,721,647 proposes a device with a mechanical display specific to the ready-to-close state of a switchgear. In this proposal, information is obtained from a movable part whose one position is specific to the ready-to-close state.

However, in such a solution,
The implementation burden is large because of the inclusion of many unique parts,
The dimensions also increase. Further, there is a problem that too much information that is not always known is provided to the operator.

The present invention has been made in view of the above points, and has a simple structure with a smaller number of parts, which can display a closing preparation completed state, and which can be opened and closed so that an operator can receive only appropriate information. It is intended to provide a device.

[0021]

The first means has at least one set of contact means, and at least one of the contact means has an open position and a closed position. One or more poles, open springs, energy storage means, and a load on the energy storage means, regardless of the position of the set of contact means, which are movable so as to be positionable. A load mechanism kinematically connected to the energy storage means, a closing latch capable of fixing the energy storage means in its loaded state, and the set of contact means by energy release of the energy storage means. Are moved to their closed position to load the open spring, and by the loaded open spring,
A kinematic system coupled to the energy storage means, the open spring and the movable contact means such that the set of contact means is biased toward their open position; A locking position for preventing movement of the set of contact means from the closed position to the open position, and enabling movement of the set of contact means from the closed position to the open position; An opening latch capable of assuming such an unlocked position, and a display device, wherein the display device is kinematically coupled to the loading mechanism and is in a "no load" position and at least a second position. A set of indicators that can take a position and the "no load" position only when the energy storage means is in its loaded state and the contact means are in the open position and The means are loaded, The so open latch takes "closed ready" position only when in its locking position One,
A mechanical display for kinematically coupled to the set of contact means and the opening latch for indicating a "ready to close" state of the switch, wherein the display comprises the The mechanical display for displaying the "closed ready" state of the switchgear, wherein the "closed ready" position is different from the "no load" position of the display and the second position of the display. A separate, third position of the display is provided, wherein the second position of the display is provided when the energy storage means is loaded and the switching device is not in its "ready to close" state. A switchgear characterized in that the switchgear is adapted to be installed in a switchgear.

According to the first means, only one display unit, which was conventionally required two, is now required, so that the structure obtained is simpler. Such a device is also advantageous from an ergonomic point of view. That is, by displaying the “no load” state, the “load / close preparation completion” state, and the “close preparation completion” state to the operator, the operator receives only appropriate information and receives unnecessary and unnecessary information. This is because it is not necessary to receive information. When the load indicator is in the "no load" position, the "not ready to close" state of the technical indicator does not provide virtually any additional information.

The second means is the first means, wherein the display unit is kinematically connected to a transmission means disposed between the closing control means and the energy storage means,
The transmission means can transmit a mechanical command from the closing control means to the closing latch only when the display unit is at the "closing preparation completed" position.

According to the second means, in the first means, since the display controls the inactivation of the closing control means, the display has a multifunctional function, thereby reducing the number of parts. You. The release function of the closing control means is effective for preventing no-load closing, that is, for a switchgear with the opening latch in the unlocked position. This no-load closure actually causes a large release of energy, which release of end of travel stopper sized to reduce the impact.
stops).

A third means is the second means, wherein the transmission means does not interfere with the close control means when the display section is not at the "closed ready" position. It is configured to be canceled.

According to the third means, in the second means, deactivation of the closing control means is performed by disengagement, and in fact, depending on the operation of the closing control means by the operator, the closing latch, the transmission No mechanical stress is transmitted to the means or the display.

A fourth means is the display device according to the second or third means, wherein the display section has a cooperating surface which can cooperate directly or indirectly with the transmitting means.

A fifth means is the display device according to any of the first to fourth means, wherein the display section is attached rotatably about a pivot. However, the present invention is not limited thereto, and a display unit capable of performing a translational motion or another suitable orbital motion may be used.

A sixth means is the display device according to any one of the first to fifth means, wherein the display section has a cooperating surface which can cooperate directly or indirectly with the open latch.

According to a seventh aspect, in any one of the first to sixth aspects, the display section has a cooperative surface capable of cooperating directly or indirectly with the set of contact means.

Eighth means is the display device according to any one of the first to seventh means, wherein the display unit has a cooperating surface capable of cooperating directly or indirectly with the load mechanism (particularly, a driving device thereof). Things.

In the above means, the link of the chain between the display and the release latch, switch bar, load mechanism or transmission means is not a cam but any other suitable form of connection, for example a cable connection means. It is also possible to provide a simple connecting means.

[0033] In the above means, furthermore, an intermediate movable part independent of the display part, which is linked with the display part, and which is opened by a cam or other suitable means by an opening latch, a switch bar, a load mechanism or (possibly) a transmission mechanism. An intermediate movable part may be provided which cooperates with the means.

A ninth means is the display device according to any one of the first to eighth means, wherein the display unit closes the electric switch only when the display unit is in a “ready to close” state. It has a cooperating surface (eg, formed by an arm or cam) that can cooperate directly or indirectly with the electrical switch.

The electrical information thus obtained makes it possible to transmit a signal to the control panel of the circuit breaker or to an internal or external monitoring device.

[0036]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of a switchgear according to the present invention. In the embodiment of the present invention shown in FIGS. 1 to 3, the same components as those in the conventional example shown in FIGS. 4 to 6 are denoted by the same reference numerals.

[Structure] In FIGS. 1 and 2, the circuit breaker includes one set of separable contact means 72 for each pole.
74 and an operating device for opening and closing the plurality of poles. The movable contact means 72 of the former contact means 72, 74 is provided with a switch bar 58 common to all the poles.
They are connected by a rod 76. The latter operating device is equipped with energy storage means.

The movable contact means 72 itself is composed of two parts. One forms a support member rotatably mounted about a fixed pivot, and the other is rotatably mounted about one pivot and supports a contact pad. The operating device has a kinematic opening / closing system (kinematic system) 62 as shown in FIGS. This system 62 has a transmission lever 16, a connecting rod 78 and an opening latch 86.

The connecting rod 78 is connected to the crank of the switch bar 58 via one end 80 thereof.
On the other hand, the other end 82 of the connecting rod 78 is attached to a pivoting release hook 84. The position of the hook 84 is held by an open ratchet 86 held by an open latch 64. The connecting rod 78 can assume a folded position corresponding to the open position of the switch bar 58 and a deployed position corresponding to the closed position of the switch bar 58.

An opening spring 88 that performs a pulling action is used to connect a connecting rod 80 to the switch bar 58 by a connecting shaft 80.
And the fixing pin. This allows
The opening spring 88 urges the switch bar 58 toward the open position and automatically tensions when closing of the plurality of poles occurs.

The operating device further comprises a load mechanism 10 having energy storage means, as shown in FIG. The load operation in the load mechanism 10 is performed by a load cam 22 keyed to a load shaft 24.
The load shaft 24 is driven in a clockwise direction in the figure by a ratchet of a crown wheel device (not shown).

The load cam 22 cooperates with the roller 20 of the load lever 16. The load lever 16 is
It supports a connecting finger 88 for an elastic energy storage means having a compression spring 14. The compression spring 14 is called a “closed spring” and is guided by a telescopic telescopic support.

The load lever 16 also belongs to the kinematic opening and closing system described above. That is, the load lever 16
Also has a finger 90 that cooperates with the connecting rod 78 (FIG. 1). In this case, rotation of the load lever 16 when the closing spring 14 is released moves the connecting rod 78 and the switch bar 58 (FIG. 1) to the closed position. In the load position shown in FIG.
Is held in position by a closure ratchet 91 and secured in that position by a closure latch 70.

3 to 6, the control panel 38 of the circuit breaker 12 includes a closing push button (closing control means) 6.
8 and a mechanical display unit 30 for displaying a load or no-load state of the switchgear. This display unit 30
Is composed of a lever that is rotatable about a pivot 32. This lever has a partially cylindrical viewing surface 3 that crosses in front of the window 36 on the front panel of the circuit breaker 12.
4 are offered. The display unit 30 is urged by a tension spring 92 in the clockwise direction in the figure.

The display 30 includes a first arm 28 having an operating surface 29, which is adapted to cooperate with a display cam 26 fixed to the load shaft 24.
The display cam 26 has a notch 40 so that the arm 28 can be accommodated in the notch 40 when the load shaft 24 reaches the load position at the position shown in FIGS. Is configured.

The display section 30 has a second arm 54, and the operating surface 55 (FIG. 3) of the second arm 54 interferes with the switch bar 58 at the position shown in FIG. I have. The display 30 also has a third arm 94 on which the operating surface 95 (FIG. 3) of which the release latch 64 is
When it is in the unlocked position shown in FIG. The display unit 30 further has a fourth arm 44, and the operating surface 4 of the fourth arm 44.
5 (FIG. 3) cooperates with a transmission sliding rack (transmission means) 46.

The sliding rack 46 has an elliptical guide hole 98 cooperating with the fixed pivot 100. The guide hole 98 allows the sliding rack 46 to have a certain degree of freedom of translation and a certain degree of rotation. Degrees of freedom are given. The sliding rack 46 is elastically biased rightward in FIGS. 3 to 6 toward a position where it can cooperate with the push button 68. As a result, a close command manually given to the push button 68 is transmitted to the close latch 70.

[Operation] The operation of the present apparatus is as follows.

In the position shown in FIG. 3, the switch bar 58 is in the closed position and the energy storage means has not been loaded. The first arm 28 of the display unit 30 is
6 is in contact with the peripheral portion 42. This causes the display 30 to assume a first position such that the portion of the cylindrical surface 34 labeled with the "no load" condition of the circuit breaker appears through the window 36.

In this position, the sliding rack 46 is pushed by its fourth button 44
And is pushed out of the interference position with the closing latch 70. This makes the closing push button 68 inoperable.

The clockwise rotation of the load shaft 24 in FIG. 2 causes the load cam 22 to rotate, whereby the load lever 16 rotates about its fixed pivot 18 and the closing spring 14 is compressed. Is done. At the end of the load stroke, the load cam 22 interferes with the ratchet 91 secured by the half-moon shaped closing latch 70, preventing continued rotation. This position is between the load cam 22 and the load lever 1.
6 corresponds to an interference area between the roller 20 and the roller 20, and in that area, the roller 20 is on the driving side and the load cam 22 is on the driven side.

At the end of the load stroke, the first arm 28 of the display 30 is at a position facing the notch 40 of the display cam 26. However, the rotation is caused by the switch bar 5 in the closed position.
8 is limited by the interference of the second arm 54 (FIG. 3) with the arm 8. Therefore, the display unit 30 is rotated to the position shown in FIG. 4 by the urging force of the return spring 92.

In this position, the sliding rack 46 is still pressed by the third arm 44 of the display unit 30 so that the push button 6
8 and the closing latch 70. As a result, the closing push button 68
It is still inoperable. The display unit 30 has a cylindrical surface 3 with a symbol indicating the “load / release” state of the circuit breaker.
4 is exposed through the window 36. The "load / release" state is a state in which the load spring 14 is tensioned but the circuit breaker is not closed.

From the position shown in FIG. 4, rotation of the release latch 64 releases the ratchet 86 (FIG. 1), which in turn releases the hook 84 (FIG. 1). The hook 84 pivots so that the connecting rod 78 (FIG. 1) passes through the dead center (beyond which it is impulsively folded). This causes the switch bar 58 to pivot to the open position shown in FIG. 5, even though the release latch 64 is in the rest position.

In this position, none of the three arms 28, 54, 94 of the display unit 30 act. Thus, the display 30 is turned clockwise by the spring 92 until the "break ready" symbol of the circuit breaker appears through the window 36. Such rotation of the display 30 also releases the sliding rack 46 which is biased rightward to assume the position shown in FIG.

When the operator pushes the closing push button 68 from the position shown in FIG. 5, the push button 68 rotates around its pivot axis, and the sliding rack 46 interferes with the closing latch 70 to move the latch 70 to that position. The sliding rack 46 is rotated clockwise until it is moved to the unlocked position.

The rotation of the closing latch 70 causes a reduction in force (re
ducer) ratchet 91 and lever 16 (FIG. 2) are released. Then, these ratchet 91 and lever 1
6 simultaneously rotates the cam 22 and the shaft 24 to the no-load position by the force of the closing spring 14. The finger 90 (FIG. 2) of the load lever 16 causes the connecting rod 78 (FIG. 1) to extend and the switch bar 58 to pivot to the closed position. At the end of this stage, the circuit breaker
It is in the position shown.

On the other hand, when a permanent release command is transmitted to the release latch 64 from the position shown in FIG. 4, the release latch 64 causes the circuit breaker 12 to be opened. In the indicated unlocked position. In this position, the release latch 64 is connected to the third arm 9 of the display unit 30.
4, and moves the display unit 30 to the “load / release” position.

[Modifications] Various modifications can be naturally conceived without departing from the scope of the present invention. In particular, the sliding rack makes it possible to provide for the indirect action of the opening latch on the display. In doing so, on the one hand, a support device on the sliding rack that can cooperate with the opening latch such that the sliding rack is disengaged from the position of interference with the push button when in the unlocked position. On the other hand, it is sufficient to provide an arc-shaped slot of the sliding rack such that the finger supported by the fourth arm of the display slides inside.

When the release latch moves to the lock release position, it moves the finger of the display unit to the load / lock position together with the release latch. When the display is in the ready-to-close position, the arc-shaped slot centered on the sliding axis of the sliding rack,
The sliding rack pressed by the closing push button can be rotated.

Further, one or more electric contacts for displaying a plurality of different states of the display section may be provided. These contacts can be actuated very simply by means of one or more cams fixed to the display.

In the above embodiments, the present invention has been described in relation to a circuit breaker. However, the present invention can be applied to any switchgear having energy storage means, such as a switchgear operated like a switch.

The switching device may be of a single pole type, in which case the switch bar and the movable contact means may be fastened to each other or may be formed by a single piece.
Further, the switchgear may be a multi-pole type. Further, the opening / closing device may be of a restricted type in which an indirect portion exists between a portion supporting the contact pad of the contact means and a portion connected to the switch bar, and such an indirect portion is unnecessary. Any unrestricted expression may be used.

The present invention can be applied to both a low-voltage switchgear and a high-voltage switchgear. Further, the display unit may be configured to rotate around a virtual axis. It can also be in the form of a sliding rack that performs a translational movement in front of the window.

[0065]

According to the present invention, only one display unit, which was conventionally required two, is now required, so that the obtained structure is simpler. "No load" for the operator
By displaying the state, the "load / close preparation completed" state, and the "close preparation completed" state, the operator receives only appropriate information and does not need to receive unnecessary and unnecessary information.

[Brief description of the drawings]

FIG. 1 is a perspective view showing, in an open state, an opening device for each pole of a circuit breaker, which is an embodiment of a switching device according to the present invention.

FIG. 2 is a perspective view of the circuit breaker shown in FIG. 1 at a load position of the energy storage and load device.

FIG. 3 is a diagram showing a closed / no-load state of the switchgear shown in FIG. 1;

FIG. 4 is a diagram showing a closed / loaded state of the switchgear shown in FIG. 3;

FIG. 5 is a view showing a state in which the opening and closing device shown in FIG. 3 is ready for closing;

FIG. 6 is a diagram showing a locked, opened, and loaded state of the switchgear shown in FIG. 3;

FIG. 7 is a diagram showing a technical mechanism of a conventional opening / closing device in a state in which preparation for closing is completed.

FIG. 8 is a view showing a technical mechanism of a conventional switchgear in an open / no-load state.

FIG. 9 is a view showing a technical mechanism of a conventional switchgear in a closed / no-load state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Load mechanism 12 Switching device 14 Closing spring (energy storage means) 22 Load cam 26 Display cam 29 Cooperation surface 30 Display part 32 Axis 45 Cooperation surface 46 Sliding rack (transmission means) 55 Cooperation surface 58 Switch bar 62 Opening and closing System (Kinematic System) 64 Open Latch 68 Close Push Button (Close Control Means) 70 Close Latch 72 Movable Contact Means 74 Fixed Contact Means 88 Open Spring 95 Cooperating Surface

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Claude, Gourlier Crawl, France, Ryu, Pablo, Nuriyuda, 342 (72) Inventor Eric, Pinero Cecine, Ryu, de, Cistrone, France, 35

Claims (9)

[Claims] At least one set of contact means (72, 74).
And at least one of the contact means (72) of the set of contact means is movable such that the set of contact means (72, 74) can assume an open position and a closed position. One or more poles, an open spring (88), an energy storage means (14), and an energy storage means (14) regardless of the position of the set of contact means (72, 74). A loading mechanism (10) kinematically connected to the energy storage means (14) for loading, a closing latch (70) capable of fixing the energy storage means (14) to its loaded state; The energy release of the energy storage means (14) causes the set of contact means (72, 74) to be moved to their closed position to load the open spring (88) and the loaded open spring (88). By) A connection with the energy storage means (14), the opening spring (88) and the movable contact means (72) such that the set of contact means (72, 74) is biased towards their open position. Kinematic system (62), configured to cooperate with said kinematic system (62) and for preventing movement of said set of contact means (72, 74) from a closed position to an open position. Opening latch (64) capable of taking a locked position such as described above and an unlocked position allowing movement of the set of contact means from the closed position to the open position.
And a display device, wherein the display device is kinematically coupled to the loading mechanism (10) and can assume a “no load” position and at least a second position, and the energy storage means. The indicator (30) taking its "no load" position only when (14) is in its loaded state; and the set of contact means (72, 74) in the open position and the energy storage means (14) is loaded and the set of contact means (72,) is in a "ready to close" position only when the release latch (64) is in its locked position.
74) and a mechanical display kinematically coupled to the release latch (64) for indicating a "ready to close" status of the switch (12), wherein the switch (12) comprises: The display unit (30) constitutes the mechanical display unit that displays a “ready to close” state of the switchgear, and the “ready to close” position is “no load” of the display unit.
A third position of the display, separate from the position and a second position of the display, wherein the second position of the display is loaded with the energy storage means (14); And an opening / closing device which is adapted to be taken when the opening / closing device (12) is not in its "closed ready" state. 2. A display according to claim 1, wherein said display section includes a closing control means.
8) kinematically connected to the transmission means (46) arranged between the energy storage means (14) and the display (30) is in the "ready to close" position. Only the transmission means (46) is adapted to transmit a mechanical command from the closure control means (68) to the closure latch (70). Switchgear. 3. When the display section (30) is not at the "ready to close" position, the transmitting means (46) does not interfere with the closing control means (68) and the closing control means engages. 3. The switchgear according to claim 2, wherein the switchgear is configured to be released. 4. The display section (30) is provided with the transmission means (4).
4. The switchgear according to claim 2, which has a cooperating surface (45) which can cooperate directly or indirectly with (6). 5. The opening and closing device according to claim 1, wherein the display section (30) is rotatably mounted around a pivot (32). 6. The cooperating surface (9) which can cooperate directly or indirectly with the release latch (64).
The switchgear according to any one of claims 1 to 5, further comprising (5). 7. The display according to claim 1, wherein said display has a cooperating surface which can cooperate directly or indirectly with said set of contact means. 7. The opening / closing device according to any one of claims 6 to 6. 8. The display unit (30) is provided with the load mechanism (1).
8. The switchgear according to claim 1, which has a cooperating surface (29) which can cooperate directly or indirectly with the switching device (0). 9. The display (30) can cooperate directly or indirectly with the electrical switch to close the electrical switch only when the display is in its "ready to close" state. The switchgear according to any one of claims 1 to 8, further comprising a cooperating surface.